Small keyboard for some practicing?

[petimar]

I am a 66 year old beginner on piano, but have been a professional player and teacher of other instruments my adult life.  I have a piano in my house, but can't always practice when I want as it sometimes bothers my wife when she is working.

I am looking for a less than 88 key inexpensive digital keyboard.  If it had 3 octaves it would work fine.  I would like full sized keys.  Doesn't have to be the greatest sound, but a decent piano sound would be nice.  Don't care about other sounds.  I would like to be able to place it on my desk to play (a good fit for my body size). 

Also like to keep it to $100 or less.  Any recommendations?

Thank you in advance!!

Pete

[martinn]

I am a 66 year old beginner on piano, but have been a professional player and teacher of other instruments my adult life.  I have a piano in my house, but can't always practice when I want as it sometimes bothers my wife when she is working.

I am looking for a less than 88 key inexpensive digital keyboard.  If it had 3 octaves it would work fine.  I would like full sized keys.  Doesn't have to be the greatest sound, but a decent piano sound would be nice.  Don't care about other sounds.  I would like to be able to place it on my desk to play (a good fit for my body size). 

Also like to keep it to $100 or less.  Any recommendations?

Thank you in advance!!

Pete

I have the Yamaha NP-12 for practicing off home, but you may not like the action of the keys, I certainly don’t. For 100$ or less, I have no clues, but that brings probably even more compromises. Playing with a great deal of realism can’t be had very cheaply or lightweight, so I long for my home e-piano.

[martinn]

Casio is considered ’cheaper’ but still a geat brand with some history.

[timothy42b]

You aren't going to be happy with any $100 digital. 
Sound doesn't matter because you can use software.  But touch does.  If it doesn't have fully weighted keys you probably aren't going to learn to play piano.
Number of keys doesn't matter.  You can play all of Bach on 64 keys.  Trouble is, most of the pianos with fully weighted keys are 88 key models.
I found a couple that fit your needs but not your price range.
Roland RD64 - 64 weighted keys but $700 plus.
Nord Electro 3 HP - 73 keys but about $2500
Korg SV1 73 -73 keys and about $1500